2. Because we are showing a positive side
Answer:
Fitzgerald's The Great Gatsby? They believe it's cheerful!!
Explanation:
Let me know if you need me to like be more specific
You didn't italize or mark the phrase, but I see one good candidate:
"The circus animal trainer" is in a way another name given to Mervin, a kind of "renaming" him: this is called an appositive phrase, so if this was the phrase appositive phrase is the answer! (also, I don't see the other phrases here).